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Both BDV and PSV are kind of safety valves. What is PSV? PSV’s are used to automatically release overpressure when the operator is unknown or unaware of the unusual circumstances that existed before a corrective action could be taken. Sometimes an operator…
What is Fire alarm system? Fire alarm system is activated by several detectors arranged in several zones, where each zone has one address itself, namely by adding an addressing module at each circuit (zone). Smoke detectors, heat detectors, manual call points, interfacing…
Welding inspector are personals who verify the work produced by welders meets specification and guidelines. Welding inspectors perform visual inspections on welded products while visual inspections are used to look more for defects in welds (such as cracks, pits, porosity and other…
The purpose of the branch is to increase the velocity of water and may be defined as “A Metal fittings between hose and the nozzle converting pressure energy to provide the nozzle with a solid jet – of water for fire fighting.”…
Pull Cord Switch is an emergency switch to stop the conveyor instantly in any dangerous condition or when an accident occurs. Since the traction cable switch is designed in such a way that it must be installed on the side of the…
What are coal feeders? Coal Feeder is a device that regulates the amount of coal to be supplied into the Coal Mill. The amount of coal is regulated according to the needs in the boiler combustion chamber (furnace). The number regulation system…
Safety instrumented system (SIS) is a system designed to monitor dangerous conditions in a plant (operation unit) and take action in the event of a dangerous condition or a condition where if no action is taken it will cause danger. This system…
Pitot tube is a device used to measure the fluid flow measurement invented by Henri Pitot, a French engineer in 18th century. It is widely to measure the airspeed of aircrafts, speedboat speed and for fluid flow measurement in industrial application. Pitot tube…
What is Direct Acting ? Direct acting means that valves uses a power supply to open and close. Power is transformed into magnetic force,in a plunger type valve,forces a plunger to move and open or close the valve seats. Other direct…
Thermocouple Gauge Thermocouple gauge is a device used to measure low vacuum.Working of a Thermocouple GaugeIn Thermocouple Gauge a filament is heated by passing constant current through it.When gas molecule interact with filament heat is carried away.Therefor the temperature is directly depended on…